Apparatus for collecting pulp from waste waters of paper-works.



. Patented Feb.. l9, l90l. v E. FULLNER.

APPARATUS FOR COLLECTING PULP FROM WASTE WATERS OF PAPER WORKS. (NoModel (Application filed Nov. 8, 1900.)

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No. 668,559. Patented Feb. |9, l90l. E. FULLNER. APPARATUS FORCOLLECTING PULP FROM WASTE WATERS 0F PAPER'WORKS.

(Application filed Nov. 8, 1900.)

2 Sheets-Sheet 2.

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ATENT 'APPARATUS FOR COLLECTING PULP FROM WASTE WATERS OF PAPER-WORKS.

SPECIFICATION formingpart of Letters latent No. 668,559, dated February19, 1901.

Application filed November 8, 1900. Serial No. 35.888. KN modem T0 aZZwhom it may concern.-

Be itknown that I, EUGEN F'E'ILLNER, of Warmbrunn, Silesia, GermanEmpire, have invented certain new and useful Improvements in Apparatusfor Collecting Pulp from Waste Waters of Paper-Works, of which thefollowing is a specification.

My invention has reference to funnel-shaped pulp-collectors; andlitsobject is to collect the material fibers contained in the waste watersof paper and cellulose works more certainly than it can be done with thefiber-collectors at present known.

The invention more particularly consists in a central inlet beingarranged in the collector, which inlet has a funnel shape in the reversedirection to the funnel shape of the collector. By this means animportant technical improvement for the separation of fibers isobtained-via, that the infiowing water first passes into a chamber thesection of which constantly increases, which has of course foraconsequence that in contrast the speed of the stream descending in thischamber diminishes to an extent corresponding to the increase of thesection or width of the chamber.

The invention further consists in a starshaped system of channelsarranged around the central inlet, by which channels the purified wateris collected in such manner that any irregular flow of the water risingin the upper funnel-shaped annular space is avoided. This regularascension of the water, in conjunction with the greatly -increasedretardation of the flow of the water in this annular space, has theaction of separating out any fibers carried with the water into thisspace.

A form of construction of this collector with a centralinverted-cone-shaped and with a star-shaped system of overflow-channelsis shown in the accompanying drawings, in which- Figure 1 is a verticalsection of same, and Fig. 2 a plan view.

The cone-shaped depositing vessel a is in the present case made ofmasonry; but of course it may be made of iron or wood. In the verticalcentral axis of the hopper there is a reversed conical inlet 1). Thesupply-pipe c for the water to be purified opens into a cylindrical neck01 of the inlet-funnel and is separated therefrom by a sieve e, whichretains the coarser impurities, while the fibers carried with the waterpass through the sieve.

In the downwardly-widening funnel b, owing to the constant increase ofsection, a delay in the flow of the descending water takes place to acorresponding extent. The consequence of this is that the fibers, whichhave always a somewhat greater specific gravity, and consequentlypossess by reason of the original speed of inflow a greater impetus,fall in an ever-slackening stream down to the lower edge of the funneland descend into the part of the deposit-hopper a situated beneath it.This descent of the fibers proceeds the more unimpededly as theupwardly-directed flow of the water is forced by the inlet-funnel towardthe wall of the depositinghopper, the consequence of which is that analmost currentless column of water is formed in the center of thedepositing-hopper and beneath the inlet-funnel, into which column thefibers (which of course are mainly delivered from the center of theinlet-cone) arrive 'in order to sink without further interruption intothe point of the hopper. The farther the fibers descend into thedeposition vessel the stronger is the mutual agglomeration of the fibersproduced by the always-narrowing shape of the hopper, and thereby analways greater accumulation of the same is caused, so that acomparatively dense mass of fibers accumulates in the point of thehopper, which mass, by the pressure of the water column above it, isforced in the usual way into a discharge-pipe f and through thisconveyed into a suitable collecting vessel. The water descending in theinlet-funnel b, and thus always spreading out, assumes first a coursedirected toward the wall of the depositing or separating hopper a andthen rises along the wall of the funnel, in the-upper part of which isarranged the star-shaped system of channels, which carry off thepurified water in such a way that any stronger fiow of the rising waterto one or more given points of the annular space is avoided, and thusthe rise of the water in said annular space can take place quietly andevenly. For this object a channel 9 is provided along the upper edge ofthe collecting-hopper and another,h,around the upper edge of theinlet-funnel Z), and these two channels are connected with one anotherby a large number of channels 1Iin the present instance ten in number.(See Fig. 2.) The channels are open above, are of V-section, and liewith theiroverfiow edges at the level of the sieve e. The channels 11have afall from the channel 7L around the inlet-funnel to the outerchannel g. The puri fled water flows out of the same into the twocollecting-channels 70 l, arranged diametrically opposite one another,from which itis discharged through down-pipes m and n.

The avoidance of any irregular flow of the water rising in the upperfunnel-shaped annular space between the wall of a and the exterior offunnel b by means of the hereinbefore-described method of catching it bymeans of the extended series of gutters in conjunction with thegreatly-increased retardation of the flow of the water has the action ofprecipitating or separating out any fibers carried with the water intothis space and accumulating same on the two funnelshaped walls of thisspace to a sufficient height of accumulation. The portion of the waterimmediately adjoining the lower edge of the inlet-hopper b is of courseengaged by this current proceeding upward between the edge of the funnelb and the opposite wall of the collecting-hopper. The descendingportions of the water more toward the center of the inlet-funnel I)proceed to a certain extent first somewhat farther down and then turnagainst the walls of the depositing-hopper, and finally also flow upwardalong the said walls. The annular aperture between the lower edge of theinlet-funnel and the wall of the collecting-hopper is preferably socalculated that an acceleration in the upwardlydirected flow of water isalso avoided at this place. It is necessary for this purpose to make theaperture so large that its total section is as large as the underopening of the inlet-funnel 1). Above the said annular aperture thewater passes into the tapering annular space between the inlet-funneland the upper part of the collecting-hopper, in which space it risesupward with an extraordinary retardation in its speed of flow.

What I claim, and desire to secure by Letters Patent, is

1. In an, apparatus for collecting pulp, in combination, a hopper ofinverted conical shape, an inlet-funnel of conical shape depending intosaid hopper axially thereof, the base of said funnel forming with thewall of the hopper a contracted annular passage centrally of the hopper,a free space converging to a contracted discharge .for the precipitatebeing formed below said funnel and a free space being provided abovesaid passage between the exterior of the funnel and thereversely-extending wall of the hopper, substantially as described. a

2. In apparatus for collecting pulp from the waste waters 'ofpaper-Works, the combination with a funnel-shaped hopper a, and acentral inverted-funnel-shaped inlet bof a system of annular and radialchannels g, h, 11 arranged in the upper part of the hopper -around theinlet-funnel, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

EUGEN FULLNER.

Witnesses:

EMIL F. HOFFMANN,

WOLDEMAR HAUPT.

